title: A new molecular variant of luteinizing hormone associated with female infertility.
abstract: OBJECTIVE
  To investigate whether the newly described G1502 to A1502 mutation in exon 3 of the LH beta-subunit gene, causing the amino acid substitution of Ser102 for Gly102, is related to female infertility.
  
  
  METHODS
  Screening of fertile and infertile women for the G1502 to A1502 mutation in the LH beta-subunit gene.
  
  
  METHODS
  Clinics and laboratories of the National University Hospital obstetrics and gynecology department, Singapore.
  
  
  METHODS
  Two hundred twelve healthy fertile women; 40 infertile women with menstrual disorders, polycystic ovary syndrome, and endometriosis; and 12 women with idiopathic infertility.
  
  
  METHODS
  Exon 3 of the LH beta-subunit gene was analyzed using polymerase chain reaction (PCR), restriction fragment length polymorphism (RFLP), and PCR-mediated direct DNA sequencing.
  
  
  METHODS
  The PCR products of patients were analyzed by RFLP, and the results were compared with those of fertile controls. DNA sequencing radiographs were compared between two mutation-bearing patients and four controls.
  
  
  RESULTS
  The mutation was identified in only two infertile women with endometriosis; other women studied were found to be negative for this mutation.
  
  
  CONCLUSIONS
  The missense mutation in the LH beta-subunit gene may be implicated in female infertility, possibly endometriosis-associated infertility in some women.
authors.affiliation: Department of Obstetrics and Gynecology, National University of Singapore, National University Hospital.
authors.forename: W X
authors.initials: WX
authors.lastname: Liao
authors.forename: A C
authors.initials: AC
authors.lastname: Roy
authors.forename: C
authors.initials: C
authors.lastname: Chan
authors.forename: S
authors.initials: S
authors.lastname: Arulkumaran
authors.forename: S S
authors.initials: SS
authors.lastname: Ratnam
mesh_terms: D000328:Adult; D000595:Amino Acid Sequence; D001483:Base Sequence; D004247:DNA / Q000235:genetics; D004715:Endometriosis / Q000097:blood / Q000235:genetics; D005091:Exons; D005260:Female; D005820:Genetic Testing; D014644:Genetic Variation; D006579:Heterozygote; D006801:Humans; D007247:Infertility, Female / Q000097:blood* / Q000235:genetics*; D007986:Luteinizing Hormone / Q000097:blood* / Q000235:genetics*; D008599:Menstruation Disturbances / Q000097:blood / Q000235:genetics; D008969:Molecular Sequence Data; D009154:Mutation; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D016649:Primary Ovarian Insufficiency / Q000097:blood / Q000235:genetics; D017386:Sequence Homology, Amino Acid
chemical_list: D007986:Luteinizing Hormone; D004247:DNA